*Department of Lake and River Fisheries, University of Warmia and Mazury in Olsztyn, Poland
**Department of Aquaculture, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Poland

ABSTRACT. The focus of this study was the agdrogenesis of ide, Leuciscus idus (L.), using eggs from other species. Chub, Leuciscus cephalus (L.), oocytes were genetically inactivated using UV irradiation. The eggs used in the experiment were obtained from dark-colored chub females, whereas milt was taken from yellow-colored (recessive marker) ide males. The highest yield of ide androgenesis was noted when eggs were exposed to a thermal shock 3 hrs 00 min after activation. Androgenetic origin (haploid or diploid embryos) was checked using a recessive color marker (“blond”).